Cultivation Guides

Getting Started: The Basics

Mushroom cultivation is fundamentally different from plant gardening. Fungi do not photosynthesize — they feed on organic matter. Understanding the basic lifecycle and environmental needs is the foundation of successful growing.

What You Need

• Spore syringe or liquid culture (starter inoculant)
• Substrate material (varies by species — see guides below)
• Sterilization equipment (pressure cooker or autoclave)
• Growing containers (bags, jars, or monotubs)
• Hygrometer and thermometer for environment monitoring
• Spray bottle for humidity management

Oyster Mushrooms (Pleurotus ostreatus)

Difficulty: Beginner

Oyster mushrooms are the ideal starting point for new cultivators. They are aggressive colonizers, tolerant of a wide range of conditions, and can grow on many common substrates including straw, coffee grounds, and cardboard.

Substrate

Pasteurized straw is the most popular and accessible substrate. Chop straw to 1-3 inch pieces, hydrate to 60-65% moisture, and pasteurize in hot water at 65-75°C for 1-2 hours. Coffee grounds can be used fresh from a coffee shop, mixed 50/50 with cardboard.

Steps

• 1Prepare and pasteurize substrate
• 2Inoculate with grain spawn (5-10% spawn ratio by weight)
• 3Incubate at 20-25°C in dark for 2-3 weeks until fully colonized
• 4Introduce fresh air, light, and 85-95% humidity to trigger fruiting
• 5Harvest when caps flatten, typically 5-10 days after pinning

Lion's Mane (Hericium erinaceus)

Difficulty: Intermediate

Lion's Mane produces cascading white spines rather than traditional caps. Prized for both culinary and medicinal uses, it requires slightly more attention to humidity and fresh air exchange than oysters.

Substrate

Hardwood sawdust supplemented with 10-20% wheat bran by dry weight. Sterilize at 121°C for 90 minutes in a pressure cooker. Master's Mix (50% hardwood sawdust, 50% soy hulls) also produces excellent results.

Steps

• 1Mix substrate and hydrate to 60% moisture
• 2Sterilize substrate bags at 15 PSI for 90 minutes
• 3Inoculate with grain spawn under sterile conditions
• 4Incubate at 22-25°C for 2-3 weeks until white mycelium fills the bag
• 5Cut X-shaped slits in the bag for fruiting bodies to emerge
• 6Maintain 90%+ humidity and good airflow; harvest when spines reach 1-2 cm

Shiitake (Lentinula edodes)

Difficulty: Intermediate

Shiitake is one of the most cultivated mushrooms in the world. Traditionally grown on hardwood logs, modern methods use supplemented sawdust blocks for faster, more reliable yields.

Substrate

Hardwood sawdust (oak, beech, or maple) supplemented with 10-15% bran. For log cultivation, use freshly cut hardwood logs 3-6 inches in diameter and 36-40 inches long.

Steps (Sawdust Block Method)

• 1Prepare supplemented sawdust at 60% moisture
• 2Sterilize bags at 121°C for 2 hours
• 3Inoculate with spawn and seal with filter patch
• 4Incubate at 21-27°C for 6-8 weeks (slower than oysters)
• 5Once fully colonized and browned, soak blocks in cold water for 24 hours to shock into fruiting
• 6Keep at 15-25°C with 80-90% humidity; harvest when caps are 70-80% open

Substrate Reference Guide

Choosing the right substrate is critical. Different species have evolved to decompose specific materials. Here is a quick reference:

• Straw — Oyster mushrooms, King oyster, some Pioppino. Pasteurization sufficient.
• Hardwood sawdust + bran — Shiitake, Lion's Mane, Reishi, Maitake. Requires sterilization.
• Master's Mix (sawdust + soy hulls) — Excellent for Lion's Mane, Shiitake, and many gourmet species. Requires sterilization.
• Compost/manure — Button mushrooms, Portobello. Requires specialized composting.
• Coffee grounds — Oyster mushrooms primarily. Mix with cardboard for structure.
• Wood logs — Shiitake, Chicken of the Woods, Nameko. Outdoor, seasonal cultivation.

Environmental Conditions

Temperature, humidity, fresh air exchange (FAE), and light all play roles in successful cultivation. During colonization, fungi prefer dark, warm, high-CO2 environments. Fruiting is triggered by cooler temperatures, high humidity, fresh air, and indirect light.

Invest in a good hygrometer and a small fan for FAE. A simple humidifier on a timer can maintain humidity in a monotub or grow tent. Patience is the most important tool — mycelium works on its own schedule.